Ion ChannelsCalcium ChannelsPotassium Channels, Inwardly RectifyingMyocytes, CardiacIon Channel GatingCalcium Channel BlockersPotassium Channel BlockersChloride ChannelsPotassium Channels, Voltage-GatedCalcium Channels, L-TypeKATP ChannelsCardiac OutputHeartPotassium Channels, Calcium-ActivatedSodium Channel BlockersShaker Superfamily of Potassium ChannelsArrhythmias, CardiacElectrophysiologyCalcium Channels, N-TypeCalcium Channels, T-TypeTRPC Cation ChannelsLarge-Conductance Calcium-Activated Potassium ChannelsCardiac Surgical ProceduresCyclic Nucleotide-Gated Cation ChannelsDeath, Sudden, CardiacEther-A-Go-Go Potassium ChannelsElectric ConductivityMyocardiumAcid Sensing Ion ChannelsEpithelial Sodium ChannelsKv1.3 Potassium ChannelKv1.2 Potassium ChannelKv1.1 Potassium ChannelKv1.5 Potassium ChannelCalcium Channel AgonistsTRPM Cation ChannelsOocytesKCNQ1 Potassium ChannelKCNQ Potassium ChannelsTRPV Cation ChannelsXenopus laevisPotassiumShab Potassium ChannelsMembrane PotentialsCells, CulturedHeart VentriclesSmall-Conductance Calcium-Activated Potassium ChannelsNAV1.5 Voltage-Gated Sodium ChannelKv1.4 Potassium ChannelTime FactorsPatch-Clamp TechniquesRats, Sprague-DawleyRyanodine Receptor Calcium Release ChannelTransient Receptor Potential ChannelsCardiomegalyKineticsMolecular Sequence DataCalciumCardiac Pacing, ArtificialXenopusShal Potassium ChannelsMyocardial ContractionShaw Potassium ChannelsAmino Acid SequenceCardiac TamponadeHeart DiseasesAction PotentialsHyperpolarization-Activated Cyclic Nucleotide-Gated ChannelsG Protein-Coupled Inwardly-Rectifying Potassium ChannelsKCNQ2 Potassium ChannelCardiac CatheterizationDose-Response Relationship, DrugAdenosine TriphosphateSodiumBariumCalcium Channels, P-TypeCell MembraneGlyburideHeart ArrestDelayed Rectifier Potassium ChannelsIntermediate-Conductance Calcium-Activated Potassium ChannelsKCNQ3 Potassium ChannelCell LineMutationLarge-Conductance Calcium-Activated Potassium Channel alpha SubunitsScorpion VenomsCalcium Channels, Q-TypeNeuronsElectrocardiographyNAV1.2 Voltage-Gated Sodium ChannelIon TransportCalcium Channels, R-TypeHeart FailureProtein SubunitsRats, WistarModels, BiologicalTetraethylammoniumCardiomyopathiesMyoblasts, CardiacProtein Structure, Tertiary